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1 December, 21:49

Which polynomial is a perfect square trinomial?

9x2 - 12x + 4

36b2 - 24b + 16

16x2 - 24x - 9

4a2 - 10a - 25

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Answers (1)
  1. 2 December, 00:48
    0
    9x² - 12x + 4

    9x² - 6x - 6x + 4

    3x (3x) - 3x (2) - 2 (3x) - 2 (-2)

    3x (3x - 2) - 2 (3x - 2)

    (3x - 2) (3x - 2)

    (3x - 2) ²

    36b² - 24b + 16

    4 (9b) - 4 (6b) + 4 (4)

    4 (9b² - 6b + 4)

    16x² - 24x - 9

    4a² - 10a - 25

    The answer is A.
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